Logos - If you choose to upload a logo to the header of a website, you will have the ability to resize it using the built-in scaling tool.
Custom Header Images - Depending on which Layout you are currently using on your site, some support the ability to “Upload full header image.” If you select this option, you will see a note about our sizing recommendations for this image based on the layout you are using.
Please note: Each layout has its own sizing recommendation.
Site Background Images - We recommend uploading an image that's about 1,500 pixels wide by about 1,000 pixels tall. If you upload an image that is too small and you have the scaling set to "Full," the image can appear pixelated or blurry. The maximum size we will display a background image at is 1,920 pixels wide. If a larger image is uploaded, we automatically resize this image down to 1,920 pixels wide.